8 ‘tee’ Command Examples and Utilization in Linux

Within the above syntax, each OPTIONS and FILES are non-obligatory parameters.

1. Save Output to a File in Linux

As mentioned beforehand, the tee command sends output to the usual output in addition to the file. To know this, first, let’s use the echo command to show the textual content on the usual output stream:

$ echo "tecmint.com"

Now, let’s use the tee command to put in writing the output to the output.txt file:

$ echo "tecmint.com" | tee output.txt

Lastly, view the contents of the output.txt file utilizing the cat command.

$ cat output.txt

Within the above output, we are able to see that the tee command sends output to the file in addition to the usual output stream.

2. Append Output to File in Linux

By default, the tee command overwrites the output information. Nonetheless, we are able to keep away from this by enabling the append mode, which appends the output on the finish of the file:

$ echo "tecmint.com" | tee -a output.txt 
$ cat output.txt 

On this instance, now we have used the -a choice to allow the append mode.

3. Write Output to A number of Recordsdata in Linux

Equally, we are able to use the tee command to put in writing output to a number of information as proven.

$ echo "tecmint.com" | tee file-1.txt file-2.txt file-3.txt

On this instance, now we have offered a number of information as command-line arguments. Now, let’s use the head command to show the contents of the information:

$ head -v file-1.txt file-2.txt file-3.txt

4. Ship Output of One Command to One other

Moreover, we are able to additionally use the tee command with the pipe operator (|). This methodology is useful after we need to retailer the output in addition to ahead it to a different command.

$ echo "tecmint.com" | tee instance.txt | wc -c
$ cat instance.txt

On this instance, first, we’re utilizing the tee command to put in writing the output to the file. Subsequent, we’re utilizing the wc command to depend the variety of characters.

5. Disguise Output of File in Linux

Within the earlier examples, we used the tee command to ship the output to the usual output. Nonetheless, in some uncommon eventualities, we need to suppress the output. In such circumstances, we are able to redirect the output to the /dev/null gadget:

$ echo "tecmint.com" | tee output.txt > /dev/null
$ cat output.txt

6. Write Output to Privileged File

Typically, we have to write the output to the privileged file. Nonetheless, we can’t obtain this utilizing simply the tee command. In such eventualities, we are able to use the mix of the sudo and tee instructions.

First, let’s change the possession of the file utilizing the chown command:

$ sudo chown root:root output.txt

Subsequent, let’s append some textual content to the output.txt file utilizing the next command:

$ echo "tecmint.com" | sudo tee -a output.txt

Lastly, let’s confirm that the file has been up to date efficiently.

7. Edit Privileged File in Linux

In an analogous means, we are able to use the mix of the sudo and tee instructions to edit the privileged file. To know this, first, let’s open a privileged file in a Vim editor and add some textual content to it:

$ vim output.txt

Now, let’s use the beneath Vim command to replace the file:

:w !sudo tee %

8. Ignore Interrupts Sign (SIGINT)

In Linux, we use the Ctrl+c key mixture to ship the SIGINT sign. The default conduct of this sign is to terminate the method. Nonetheless, we are able to use the -i choice to ignore the interrupt:

$ echo "tecmint.com" | tee -i instance.txt
$ cat instance.txt

On this information, we realized in regards to the tee command utilizing some sensible examples. Customers can consult with this information whereas working with Linux programs from the command line interface.

Are you aware of some other greatest instance of the tee command in Linux? Tell us your views within the feedback beneath.